//
//  TuskerNavigationDelegate.swift
//  Tusker
//
//  Created by Shadowfacts on 9/30/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit
import SafariServices
import Pachyderm

protocol TuskerNavigationDelegate {
    func selected(account accountID: String)
    
    func selected(mention: Mention)
    
    func selected(tag: Hashtag)
    
    func selected(url: URL)
    
    func selected(status statusID: String)
    
    func reply(to statusID: String)
    
    func showLargeImage(_ image: UIImage, description: String?, animatingFrom originView: UIView)
    
    func showMoreOptions(forStatus statusID: String)
}

extension TuskerNavigationDelegate where Self: UIViewController {
    
    func selected(account accountID: String) {
        // don't open if the account is the same as the current one
        if let profileController = self as? ProfileTableViewController,
            profileController.accountID == accountID {
            return
        }
        
        guard let navigationController = navigationController else {
            fatalError("Can't show profile VC when not in navigation controller")
        }
        let vc = ProfileTableViewController.create(for: accountID)
        navigationController.pushViewController(vc, animated: true)
    }
    
    func selected(mention: Mention) {
        guard let navigationController = navigationController else {
            fatalError("Can't show profile VC from mention when not in navigation controller")
        }
        let vc = ProfileTableViewController.create(for: mention.id)
        navigationController.pushViewController(vc, animated: true)
    }
    
    func selected(tag: Hashtag) {
        guard let navigationController = navigationController else {
            fatalError("Can't show hashtag timeline when not in navigation controller")
        }
        let timeline = Timeline.tag(hashtag: tag.name)
        let vc = TimelineTableViewController.create(for: timeline)
        navigationController.pushViewController(vc, animated: true)
    }
    
    func selected(url: URL) {
        let vc = SFSafariViewController(url: url)
        present(vc, animated: true)
    }
    
    func selected(status statusID: String) {
        // don't open if the conversation is the same as the current one
        if let conversationController = self as? ConversationViewController,
            conversationController.mainStatusID == statusID {
            return
        }
        
        guard let navigationController = navigationController else {
            fatalError("Can't show conversation VC when not in navigation controller")
        }
        let vc = ConversationViewController.create(for: statusID)
        navigationController.pushViewController(vc, animated: true)
    }
    
    func reply(to statusID: String) {
        let vc = ComposeViewController.create(inReplyTo: statusID)
        present(vc, animated: true)
    }
    
    func showLargeImage(_ image: UIImage, description: String?, animatingFrom originView: UIView) {
        guard let self = self as? UIViewController & LargeImageViewControllerDelegate else { return }
        let vc = LargeImageViewController.create(image: image, description: description)
        vc.delegate = self
        var frame = originView.convert(originView.bounds, to: view)
        if let scrollView = view as? UIScrollView {
            let scale = scrollView.zoomScale
            let width = frame.width * scale
            let height = frame.height * scale
            let x = frame.minX * scale - scrollView.contentOffset.x + scrollView.frame.minX
            let y = frame.minY * scale - scrollView.contentOffset.y + scrollView.frame.minY
            frame = CGRect(x: x, y: y, width: width, height: height)
        }
        vc.originFrame = frame
        vc.originCornerRadius = originView.layer.cornerRadius
        vc.transitioningDelegate = self
        present(vc, animated: true)
    }
    
    func showMoreOptions(forStatus statusID: String) {
        guard let status = MastodonCache.status(for: statusID) else { fatalError("Missing cached status \(statusID)") }
        
        let alert = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
        if let url = status.url {
            alert.addAction(UIAlertAction(title: "Open in Safari...", style: .default, handler: { _ in
                let vc = SFSafariViewController(url: url)
                self.present(vc, animated: true)
            }))
            alert.addAction(UIAlertAction(title: "Share...", style: .default, handler: { _ in
                let vc = UIActivityViewController(activityItems: [url], applicationActivities: nil)
                self.present(vc, animated: true)
            }))
        }
        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
        present(alert, animated: true)
    }
    
}